Pressure filter for liquids



NOV. 12, 1929. N, LANE-5 1,735,007

PRESSURE FILTER FOR LIQUIDS Filed sept. 21. '1928 s sheets-sheet 1 Mm@ IBY ,JM- 1,

! ATTORNEY Nov. 12, 1929. N. LANEs 1,735,007

PRESSURE FILTER Fon LIQUIDs Filed Sept. 2l. 1928 5 Sheets-Sheet 2ATTORNEY NOV. 12, 1929. N, LANES 1,735,007

PRESSURE FILTER FOR LIQUIDS Filed Sept. 2l. 1928 5 Sheets$heet 3 IVENTORw64 AL,

ATTORNEY Patented Nov. 12, 1929 UNITED STATES NATHAN tenne, or NEW YORK,N. Y.

PRESSURE FILTER FOR LIQUIDS Application filed September 2 The object otthe present invention is to provide a filter tor liquids, and morepartic-y ularly adapted ior pharmaceuticals, iiavoring extracts, wines,pertumes and the like, comprising a easing 'for reception of thetilt-ered liquid, the cash g; being ot distinc tire form and having'removably applied thereto a screen, usually ot mei al mesh, andexpanding into such position that the exterior surface oi the screenlies closely adjacent to the plane ot the casing, The invention isparticularly applicable to drum filters used under pressure, for veryfine iltering pur! poses, wherein jointshave been avoided and the screenhas beensoldered in position. By

the present invention it is possible to removably secure the screen tothe drum and at the same time effect a tight, pressure-proof liointbetween the screen and the -filter iraine.

This is a great advantage since the periodic renewal of the screen maybe effected without inciting solder and rai-soldering, which hasheretofore required removal ot the iilters to a shop si'iecially equi1oped for the purpose.

'l` he invention wi be described with rotercnce to the accompanyingdrawings in which- Figure l is a view in partial cross section of anembodiment of the invention, and

Figure .2 is a plan view ot the same;

Figure 3 is an enlarged detail, partly in section, showing the expandingmeans in released position, the view being in the direction of thearrows 3 3, Fig. 5;

Figure 4f a view similar to Fig. 5, showing the expanding means inactive position;

Figure 5 a sectional view on the line 5 5, Fig. 3;

Figure G is a bottom plan view of the cxpanding means in position, theexpander ring and screen being shown in section;

Figure ,7 is a perspective view of the bridge plate; v

Figure 8 is a fragmentary sectional view of the casing, two screens andtwo expander rines, showing the position and action of a separatorshoulder carried by the casing;

Figure S) is a perspective sectional view, showing the expander ringwith the separator shoulder g 1, 1928. Serial N0. 307,459.

Figure l0 is a detail sectional perspectiver view showing the casingwith the separator shoulder Figure 11 is a sectional view of themodified form ot'` iilter design to be mounted on a hollow shaft forrotation, and

Figure l2 is a sectional plan View of the same;

Figure 13 is a view of the hub of the filter shown in F i g. 11 with aclamping ring thereiior.

Referring to the drawings, A represents a two-part casing joint at 1.The two halves et the easing are alike and the description 0f one willsu'lice tor the other.

llithin the periphery of the casing and formed in its front face is anannular depression or channel 2, which maybe effected through spinningof the metal, or by a die.

The section of the casing within the annular ring is perforated so as toadmit liquid Within the casing. from which it may pass through an outletneck 3.

Folded about an expander ringT 4e, preferably in a manner illustrated inFig.y 9, is a screen 5 which may be of line metal mesh, the

iineness to be determined by the character oi the liquid to be filtered.The expander ring with the mesh is placed in position wit iin thechannel 2. T he expander ring is not endless, but is split, and each endcarries a small block 6 pivotally connected at 7 to a toggle link 8, thelower end of each link kbeing pivoted to the toggle oint member 9, inwhich is threaded or otherwise suitably secured a stud 10. rlhe studprojects through a bridge piece 11 serving to lill the gap between thetwo ends o the expander, the stud thence passing through the wall of theeasing A and having threaded thereon a wing nut 11X, or having aixedthereto any other means tor operating the toggle to expand or contractthe expander ring. The expansion may be against the action of a spring12 surrounding the stud, so that the releasing action of the expanderring may be rapidly effected merely through the rotation ot the wing nut11.

The expander ring may be serrated on its outer surface as shown at 4X,Fig. 9, and its use need not be Confined to the form of casing Cilillustrated in Figs. l and 2. ln Figs. 8, ll and i2 l here shown acasing in modiled form, having a straight unchanneled outer and innerwall.

In the said modification the casing may be provided with inwardlj.7projecting separator shoulder 13 against which the screen folded aboutthe inner edge of each expander may abut, as shown in Figs. 8 and ll. Insuch case the expanding mechanism may be that illustrated in Figs. 3 andl.

rlie device is applicable to rotar)7 iilters and is shown in thatconnection in Figs. ll and l2. A hollow hub le is provided and eachscreen is clamped against a shoulder l5 of the hub b v a clamping ring`1G threaded upon the hub. ln the use of such a iilter the huh is placedupon a hollow shaft and the liquid passes from the screen portion ot thefilter through an aperture or apertures i7, into the hub and through thehollow shaft to a final point ot discharge, as will be understood bvthose s zilled in the art. intermediate members l5 and the screen may leplaced rubber washer rings sim ar to those indicated at 18, Fig. l, itdesired. These rings assist in creating a tight joint.

Having described my invention what I claim and desire to secure byLetters i e is as follows, it being understood that various modicationsmay be made in the torni and arrangement oit the elements illustrated inthe drawings without departing from the spirit of the invention, itbeing understood that asbestos, pulp, intusorial earth, etc. mayv beplaced upon the screen as a filtering medium, as supplementing` theaction of the screen itself.

I claiml. in filters for liquids, a casing having an annularscreen-contact wall, a` screen, expander ring receiving said screen andplaced in such position that a section of the screen is placedintermediate the ring and said wall, and means for expanding the ring toradi lljv expand the screen and to carry7 an annular marginal sectionthereotl into forcible contact with said wall, as and tor the purposeset forth.

Q. ln lters Jfor liquids, a casing ha fing a screen-contact wall, ascreen, a split ring so related to the screen that a section of thelatter lies intermediate the ring and said wall, the ring being shieldedby the screen, a toggle having connections with each end ot the ring, ascrew stud connected to the toggle and projecting through the casing, abridgepiece carried by the stud, a spring engaging the bridge-piece andthe toggle, and means i'or moving the stud endwise to actuate the toggleand expand the ring.

3. ln drum lters for liquids, a casing, an annular channel formed in thecasi a split ring disposed in the channel, a screen having a section ling within the channel intermediate aA Wall thereof and the ring andshielding the latter, and means 1for rechanging the diameter of saidring from a point exterior of the casing.

t. ln filters for liquids7 a casing having opposed faces, each :tacehaving 'formed therein an annular inwardlyv proj ecting channel, screenfor each tace ot the casing, said screen having section disposed withinthe channel, and means in each channel tor er;- panding the screenradially and forcing an annular marginal section tl erect against theoutermost wall or" the channel.

ln filters for liquids, a casing having an annular screen-contact wall,a screen, a ring receiving said screen and placed in such position thata section ot the screen is placed intermediate the ring and said walland the ring lies within the casing shielded by the main body of thescreen, and means for changing the diameter of the ring to carr)7 thescreen into forcible contact with said wall, as and tor the purpose setforth.

6. A device constructed in accordance with claim 5 in which the ring isprovided with a serrated Yface for direct contact with the screen.

ln testimonyT whereof, I have signed my name to this speciiication.

Ni-THLN LANES.

